The trend had already started with the release of Ubuntu Karmic. A number of community contributed themes started pouring in and some of them even got into the list of default themes for Ubuntu. Now, community contributed themes are gaining further traction with the release date for Ubuntu Lucid Lynx 10.04 getting nearer everyday. Meanwhile, take a look at 15 Awesome Wallpapers from Ubuntu Artwork Pool.

After installing latest murrine engine, you can now install the theme you want.

You can either download the whole community theme package. Direct link here. Or you can goto the download page here.(simply double-click for installation)

Now, you may not have all the themes available in the above package. For individual lthemes, look at the links given along with the screenshots above. If you want to explore further into the community contributed themes, look here.